用數組提供準備語句

Question

我可以在Postgres中使用預準備語句來添加多個值嗎？當我看到事物被添加到array($val)準備好的聲明中時，我想到應該能夠提供一系列值放在我的表中。這是瘋狂的不正確？當我嘗試時，我在我的db表中看到只有Array。我不知道它是否是一個實際的陣列，但我猜測，只是這個詞，因爲這個列是一個簡單的character variable。

$tag = array('item1', 'item2', 'item3'); 

// Prepare a query for execution 
$result = pg_prepare($dbconn, "my_query", "INSERT INTO $table ($column) VALUES ($1)"); 

// Execute the prepared query. Note that it is not necessary to escape 
// the string "Joe's Widgets" in any way 
$result = pg_execute($dbconn, "my_query", array("$tag")); 

否則，爲什麼一個值作爲數組提供？

Answer 1

你可以嘗試序列化：

$tag = array('item1', 'item2', 'item3'); 
$tag = serialize($tag); 
// Prepare a query for execution 
$result = pg_prepare($dbconn, "my_query", "INSERT INTO $table ($column) VALUES ($1)"); 

// Execute the prepared query. Note that it is not necessary to escape 
// the string "Joe's Widgets" in any way 
$result = pg_execute($dbconn, "my_query", $tag); 

然後，當你想從數據庫得到它作爲一個PHP數組，反序列化它。

Answer 2

不，這不是，你插入的文本數組...如果$列的類型是文本你的代碼應該閱讀

$tag = array('item1', 'item2', 'item3'); 

// Prepare a query for execution 
$result = pg_prepare($dbconn, "my_query", "INSERT INTO $table ($column) VALUES ($1)"); 

// Execute the prepared query. Note that it is not necessary to escape 
// the string "Joe's Widgets" in any way 
foreach($tag as $i) 
    $result = pg_execute($dbconn, "my_query", array($i)); 
/// alternatively you could try this if you really wanna insert a text as array of text without using text[] type - uncomment line below and comment the 2 above 
// $result = pg_execute($dbconn, "my_query", array(json_encode($tag))); 

，或者如果你定義$列文本[]這是PostgreSQL的法律作爲數組代碼應該讀取

$tag = array('item1', 'item2', 'item3'); 

// Prepare a query for execution 
$result = pg_prepare($dbconn, "my_query", "INSERT INTO $table ($column) VALUES ($1)"); 

// Execute the prepared query. Note that it is not necessary to escape 
// the string "Joe's Widgets" in any way 
$tmp = json_encode($tag); 
$tmp[0] = '{'; 
$tmp[strlen($tmp) - 1] = '}'; 
$result = pg_execute($dbconn, "my_query", array($tmp));